The final episode saw David and his wife, Lisa, travel to the mountains to die on their 400th birthday. Their loyal fox, Swift, is told he can't climb the mountains with them, and must instead watch as his gnome friends die and turn into trees, in Nick Jr.'s apparent take on a David Lynch movie.

The best episodes of "Batman: The Animated Series" featured tragic, empathetic villains (e.g. the Emmy Award-winning "Heart of Ice"). In this episode, a bitter, lonely former child star who is unable to transition into adulthood -- thanks to an endocrine disorder that prevents her from growing old -- kidnaps her former TV co-stars, and it's up to Batman to save the day. "I didn't mean to..."

Wherein a bulldog worries his kitten friend has been baked into a cookie. Directed by Chuck Jones, this "Merrie Melodies" cartoon was voted #36 of the 50 Greatest Cartoons of all time by members of the animation field in 1994.

Wherein Lisa's substitute teacher, Mr. Bergstrom (voiced by Dustin Hoffman, but credited as Sam Etic), teaches her life is worth living, before leaving her for another teaching job. The Simpsons gave us so many tear-jerking moments that this list needs at least two ("And Maggie Makes Three," "HOMR," and "Lisa's First Word" get honorable mentions).